检测日志的

import java.io.*;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

/**

• 实时显示日志
  /
  public class LogView {
  private long lastTimeFileSize = 0; //上次文件大小
  /*

  • 实时输出日志信息
  • @param logFile 日志文件
  • @throws IOException
    */
    public void realtimeShowLog(File logFile) throws IOException {
    //给文件增加读写权限
    final RandomAccessFile randomFile = new RandomAccessFile(logFile, “rw”);
    //启动一个线程每5秒钟读取新增的日志信息
    ScheduledExecutorService exec = Executors.newScheduledThreadPool(2);
    exec.scheduleWithFixedDelay(new Runnable() {
    public void run() {
    try {
    //获得变化部分的
    randomFile.seek(lastTimeFileSize);
    String tmp = “”;
    while ((tmp = randomFile.readLine()) != null) {
    System.out.println(new String(tmp.getBytes(“ISO8859-1”)));
    }
    lastTimeFileSize = randomFile.length();
    } catch (IOException e) {
    throw new RuntimeException(e);
    }
    }
    }, 0, 5, TimeUnit.SECONDS);
    exec.scheduleWithFixedDelay(new Runnable() {
    @Override
    public void run() {
    Log();
    }
    },1,10,TimeUnit.SECONDS);
    }

  public static void main(String[] args) throws Exception {
  LogView view = new LogView();
  final File tmpLogFile = new File(“D:\file111.txt”);
  view.realtimeShowLog(tmpLogFile);
  }

  public void Log(){
  try {
  System.out.println(“1111111111”);
  BufferedWriter writer = new BufferedWriter(new FileWriter(“D:\file111.txt”,true));
  writer.write(“2024-12-04 17:04:31 |WARN |http-nio-8002-exec-4 |DruidAbstractDataSource.java:1489 |com.alibaba.druid.pool.DruidAbstractDataSource |discard long time none received connection. , jdbcUrl : jdbc:mysql://127.0.0.1:3306/NwdCRM?useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai, version : 1.2.4, lastPacketReceivedIdleMillis : 85846”);
  writer.newLine();
  writer.flush();
  writer.close();

   } catch (IOException e) {
       e.printStackTrace();
   }
  

  }
  }